Rolled-metal piling



J. v LINDENLAUF ROLLED METAL FILING Filed Jan. l5, 1926 Patented .lune29, 1926.

time

PATENT F'ECE.

EGSEPH LNDLVNLAUF, OF PITTSBURGH,

PENNSYLVANIA, ASSIEGNOR` OF THREE- ElirlE-LHSV TO HERMAN STRATMAN ANDTO-EIGIITHS TO HARVEY M. ARONON, BOTH OF PTTSB'URGH, PENNSYLVANA. i

nonnen-METAL PXLING,

Application filed January The invention relates to rolled interlockf ingmetal piles of the type, which, when connected together, form acontinuous wall consisting ot' a series of troughs or U-sections. Theinvention has for its principal objects, the provision of a pileconstruction; (l) having` a kgreat degree of strength and rigidity,bothlongitudinally of the wall formed,

; and transversely thereof, in proportion to the weight of metalemployed, (2) which can be easily rolled by ordinary methods; in whichtheneutral axis of the pile is parallel to the axis of the wall andwhich either coincides with such kaxis of the wall or is very close toit in all cases, (e) and in which the interlock is of a very substantialcharacter, readily formed in the rolling operation, and designed toimpart a maximum amount of strength and rigidity to the completed wall.Certain embodiments ot' the invention are shown in the accompanyingdrawings, wherein:

Figures l, 2, 3 and 4: are end views showing different forms of theconstruction, and

r Figs. 5 and 6 are fragmentary detail views showing the manner ofrolling the hooks of Figs. l and 2 preliminary to bending them.

`Referring to Fig. l, A is one complete pile, while B and C are the endportions of adjacent piles identical in construction with A. The pile Aconsists of a central U- trough or section 2 and two side U-troughs orsections 3 and 4. The pile may be con. structed of a greater number ofU-sections, but three of such sections, as illustrated, is the preferrednumber, as a greater number render the pile more or less unwieldy anddifiicult to handle and roll.

The pile may be rolled by the three roll system, the hook being formedduring the rolling operation, as indicated in dotted lines in Fig. 5,after which it is bent to the iinal form asshown in Fig. 1. The neutralaxis of the pile section is somewhat below the axis m-m of the wall, dueto the fact that the two webs 6, 6 lie on the same side of the axis withonly the single web 7 on the other side of such axis, but this departureis not great, and, if desired, the oen tral section 2 may be rolledsomewhat deeper than 3 and 4, or with its web f? slightly thicker thanthe webs 6, 6, in order to bring the neutral axis into coincidence withthe axis of the wall.

15, 1926. seriaino. 81,394.

vThe end flanges ofthe piles are formed as intel-locks and arepreferably substantially equal in length tothe depth of the troughs 2, 3anda. This disposes the metal of the flanges to the best advantage, andadds greatly tothe stiffness of the complete wall as compared with theone made up of piles having short interlocks. Each liange or interlockis made up oit twoV parts 8 and 9, substantially,equal in length andhaving an inclined or oblique connecting part 10, lt is the coaction ofthe two `engaging inclined parts 10, `10 on the flanges of adjacentpiles, which Vprevents the piles from separating atterthey are onceassembled. This expedient does away with the require ment of thickenedor bulbous portions at the ends of the interlocking flanges, suoli aswould be required to prevent a separation of the piles, if theinclined'parts 10, 10 were not employed. The inter-locks with bulbousthickened portions at the ends have the dis# advantage of increaseddifficulty in rolling. The location Vof `the hooks 5, 5 on the outersides of the interlocking flanges, instead of on` their inner sides,also involves a con* structive advantage, as no ditiiculty is expe,-rienced in forming the hooks during the ordinary rolling operation, ifthese hooks are formed on the outersides. This is not the case if theywere formed on the inner sides ofsuch flanges. lt will also be notedthat the pile is vsymmetrical aroundits axis /-g/ at right angles to theaxis m-#w so that there is no tendency of the individual piles to twist,either in driving, or when placed under stress applied at right anglesto the wall formed, and to which the structure is ordinarily exposedwhen used as a retaining wall. The advantages of the structure incidentto its strength per unit of weight, to the ease with which it may berolled, and to the superior character of the interlock, will be readilyapparent to those familiar with the requirements in sheet metal pileconstructions.

Figs. 2, 3 and il illustrate modilications.`

If it is desired to roll the shape by means of the old two-roll system,the hook .5a-is preferably rolled in the position shown by the dottedlines in Fig. 6, after which it is bent to the position of Fig. 2. Thegroove 11 is provided to facilitate bending after rolling, although thismay be dispensed with. Fig. 3 shows two spaces 12, l2 which can be usedfor packing or which can serve the purpose of providing an earth cushionwhen driving.` Figa shows a bulb 13 on the ends of the interlockingflanges, thus inciea-singthe bearing at the ends of such anges andgiving a somewhat more secure interlock combined with the packingrecesses than is the case in the Fig. 3 construction. This pile has,however, the disadvantage of greater difliculty in rolling than the Fig. l construction.

lVhat- I claim is:

l. A wall made up of a plurality of similar interlocking piles,comprising integral rolled sections arranged with their neutral axes inparallelism, and each pile consisting of a plurality of U-shaped troughswith the successive webs thereof on opposite sides of the neutralaxis ofthe pile and remote tlierefromand with the outer sides of the outertroughs constituting interlocking members 'having a length substantiallyequal to the depth of the troughs, and each having a hook on its outerside at its base receiving `the end of the next interlocking member,

each of said interlocking members comprising an inner and an outer partlying in substantially parallel planes and connected by a part directedtransversely of the planes of such inner and outerparts.

2. VA wall made up of a plurality of simila-r interlocking piles,comprising integral rolled sections arranged with their neutral axes inparallelism, and each pile consisting of a pair of U-sliaped'troughswith a reverse trough therebetween, the outerside of each of said pairsof U-shaped troughs being formed as Van interlock having a lengthsubstantially equal to the depth of the U-shaped troughs and having ahook on its outer vside Vat its base receivingthe end of the nextinterlock, each' of said interlocks being formed intwoparalleland'substantially equal parts with a transverse comieetingparttherebe- Y tween and the neutral axis of the pile lying substantiallymidway between the webs of the troughs.

V3. A wall made up of a vplurality of similar interlocking piles,comprising integral rolledwsections arranged with their neutral axesinparallelism, and each pile consisting `of aplurality of U-shaped troughswith the outer sides of the outer troughs constituting interlockingmembers having a length substantially equal to the depth of the troughs,and each having a hook on its Vouter side at its base receiving the endvof the next` interlocking member, each of said interlock-\ ing memberscomprising an inner and an outer part lying 'in substantially parallelplanes and connected byV a part directed transversely of theplanes ofsuch inner and outer parts, and each of said members being of decreasingthickness from its Abase toits outer end. v

ly of the planes of such inner andl outer parts, and each of saidmembers being of a thickness at its outer end which is no greater thanthat at its base and the neutral axis of the pile lyingsubstantiallymidway between the webs of Ythe troughs.

In testimony whereof, I have hereunto subscribed my name this 6th day ofJanuary, 1926. i

' 1 JOSEPH LINDENLAUF.

